Justin Bieber didn’t let injustice prevail at Coachella.

The Biebs punched a man who was assaulting a woman at the festival, TMZ reported.

TMZ reported that a man “went ballistic” and allegedly grabbed a woman by the throat. Luckily, Justin was there and yelled for the man to let her go. The man refused, telling Justin to “go f*ck yourself.”

After that, Justin “hit the man in the face and pushed him against the wall … allowing the woman to break free.”

TMZ said the man looked to be “under the influence of drugs,” and later chased after an SUV he thought was carrying Bieber. He was eventually arrested by cops.